| David Daney | 50a41ff | 2009-05-27 17:47:42 -0700 | [diff] [blame] | 1 | /* |
| 2 | * This file is subject to the terms and conditions of the GNU General Public |
| 3 | * License. See the file "COPYING" in the main directory of this archive |
| 4 | * for more details. |
| 5 | * |
| 6 | * Copyright (C) 2008, 2009 Cavium Networks, Inc. |
| 7 | */ |
| 8 | |
| 9 | #ifndef __ASM_HUGETLB_H |
| 10 | #define __ASM_HUGETLB_H |
| 11 | |
| 12 | #include <asm/page.h> |
| 13 | |
| 14 | |
| 15 | static inline int is_hugepage_only_range(struct mm_struct *mm, |
| 16 | unsigned long addr, |
| 17 | unsigned long len) |
| 18 | { |
| 19 | return 0; |
| 20 | } |
| 21 | |
| 22 | static inline int prepare_hugepage_range(struct file *file, |
| 23 | unsigned long addr, |
| 24 | unsigned long len) |
| 25 | { |
| 26 | unsigned long task_size = STACK_TOP; |
| 27 | struct hstate *h = hstate_file(file); |
| 28 | |
| 29 | if (len & ~huge_page_mask(h)) |
| 30 | return -EINVAL; |
| 31 | if (addr & ~huge_page_mask(h)) |
| 32 | return -EINVAL; |
| 33 | if (len > task_size) |
| 34 | return -ENOMEM; |
| 35 | if (task_size - len < addr) |
| 36 | return -EINVAL; |
| 37 | return 0; |
| 38 | } |
| 39 | |
| 40 | static inline void hugetlb_prefault_arch_hook(struct mm_struct *mm) |
| 41 | { |
| 42 | } |
| 43 | |
| 44 | static inline void hugetlb_free_pgd_range(struct mmu_gather *tlb, |
| 45 | unsigned long addr, |
| 46 | unsigned long end, |
| 47 | unsigned long floor, |
| 48 | unsigned long ceiling) |
| 49 | { |
| 50 | free_pgd_range(tlb, addr, end, floor, ceiling); |
| 51 | } |
| 52 | |
| 53 | static inline void set_huge_pte_at(struct mm_struct *mm, unsigned long addr, |
| 54 | pte_t *ptep, pte_t pte) |
| 55 | { |
| 56 | set_pte_at(mm, addr, ptep, pte); |
| 57 | } |
| 58 | |
| 59 | static inline pte_t huge_ptep_get_and_clear(struct mm_struct *mm, |
| 60 | unsigned long addr, pte_t *ptep) |
| 61 | { |
| 62 | pte_t clear; |
| 63 | pte_t pte = *ptep; |
| 64 | |
| 65 | pte_val(clear) = (unsigned long)invalid_pte_table; |
| 66 | set_pte_at(mm, addr, ptep, clear); |
| 67 | return pte; |
| 68 | } |
| 69 | |
| 70 | static inline void huge_ptep_clear_flush(struct vm_area_struct *vma, |
| 71 | unsigned long addr, pte_t *ptep) |
| 72 | { |
| 73 | } |
| 74 | |
| 75 | static inline int huge_pte_none(pte_t pte) |
| 76 | { |
| 77 | unsigned long val = pte_val(pte) & ~_PAGE_GLOBAL; |
| 78 | return !val || (val == (unsigned long)invalid_pte_table); |
| 79 | } |
| 80 | |
| 81 | static inline pte_t huge_pte_wrprotect(pte_t pte) |
| 82 | { |
| 83 | return pte_wrprotect(pte); |
| 84 | } |
| 85 | |
| 86 | static inline void huge_ptep_set_wrprotect(struct mm_struct *mm, |
| 87 | unsigned long addr, pte_t *ptep) |
| 88 | { |
| 89 | ptep_set_wrprotect(mm, addr, ptep); |
| 90 | } |
| 91 | |
| 92 | static inline int huge_ptep_set_access_flags(struct vm_area_struct *vma, |
| 93 | unsigned long addr, |
| 94 | pte_t *ptep, pte_t pte, |
| 95 | int dirty) |
| 96 | { |
| 97 | return ptep_set_access_flags(vma, addr, ptep, pte, dirty); |
| 98 | } |
| 99 | |
| 100 | static inline pte_t huge_ptep_get(pte_t *ptep) |
| 101 | { |
| 102 | return *ptep; |
| 103 | } |
| 104 | |
| 105 | static inline int arch_prepare_hugepage(struct page *page) |
| 106 | { |
| 107 | return 0; |
| 108 | } |
| 109 | |
| 110 | static inline void arch_release_hugepage(struct page *page) |
| 111 | { |
| 112 | } |
| 113 | |
| 114 | #endif /* __ASM_HUGETLB_H */ |